How to find internal hard drive when booting from USB?

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http://askubuntu.com – Trying to rescue a friend's computer. Put Ubuntu 12.10 on a Flash drive, changed the boot order, and fired it up; no problem. But now that I'm in, I can't seem to find the internal drive! Any thoughts? I ran sudo fdisk -l in the Terminal and got this: Disk /dev/sdb: 15.6 GB, 15610576896 bytes 119 heads, 55 sectors/track, 4658 cylinders, total 30489408 sectors Units = sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0xc3072e18 Device Boot Start End Blocks Id System /d (HowTos)